P0CE0Hybrid/EV Battery Pack Coolant Control Valve A Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0CE0 means coolant control valve A of the battery loop is electrically sound but does not reach or hold its commanded position. GM's 2011 Chevrolet Volt checks the four-port valve in stages: an end-stop learn, reaching the target within 1.5 s, drift above 3 % and a noisy feedback; 1280 of 1600 samples at 6.25 ms set a Type B code. GM's 2016 ELR tables use P1F56 for this. Audi stores P0CE000 in the thermal management unit of the 2020-2022 Q5 TFSI e and fixes it with new software (TSB 2067066). Mercedes reads it as a battery coolant shutoff valve that does not close. Toyota reports its RAV4 Prime fault P0CDF72, a stuck-open battery cooling valve, as SAE P0CE0 and revised the air conditioner amplifier logic (T-SB-0057-21). The opposite case is P0CE1.
- What you may notice
- MIL on, often without other symptoms
- Battery temperature regulation less effective
- Likely causes
- LikelyControl software or limits too strict (Audi, Toyota updates)
- PossibleValve sticking or actuator too weak
- RarePosition feedback drifted or noisy
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.